. The Botanical Class-Book and Flora of Pennsylvania. 187. A polypetalous corolla also may be regular or irreg-ular. The lower_ part of the petal is called the elaio, andwhen this is well marked, they are said to be unguiculate;the upper and spreading portion is termed the lamina orborder. Regular polypetalous corollas have received the followingnames : 1. Cruciform, (Fig. 94,) when there are four petalsspreading at right angles to each other in the form of across,as in the Mustard, Radish, Turnip. Plants with this corollaconstitute the Natural Order Crueifcra?, corresponding to theclass Tetra
. The Botanical Class-Book and Flora of Pennsylvania. 187. A polypetalous corolla also may be regular or irreg-ular. The lower_ part of the petal is called the elaio, andwhen this is well marked, they are said to be unguiculate;the upper and spreading portion is termed the lamina orborder. Regular polypetalous corollas have received the followingnames : 1. Cruciform, (Fig. 94,) when there are four petalsspreading at right angles to each other in the form of across,as in the Mustard, Radish, Turnip. Plants with this corollaconstitute the Natural Order Crueifcra?, corresponding to theclass Tetradynamia in the Linnean arrangement. 2. Rosaceous Hike the rose. Fig. 95,1 when the corolla F G2 COROLLA. is regular, consisting of five or more petals, attached to thereceptacle with little or no claws, as in the Rose, Apple, andCherry. • 95. 96. 7ln -
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